Bobebt stickdobn



May 17, 1927.

R. STICKDORN FLUSH DEVICE FOR WATER CLOSETS Filed Feb. 27, 1925 a wr.

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Patented May 17, 1927.

y UNITED i STATES PATENT OFFICE.

.ROBERT STICKDORN, OFMUNICH, GERMANY.

FLUSH DEVICE FOR WATER-CLOISETS Application filed February 27, 1826, Serial N 0591,126, and in Germany March 7, 19.25.

My invention relates to the known flush devices for water closets of the type come prising an air reservoir containing no water when the apparatus is at rest. As `soon as the flush is to pass through the closet, the reservoir is connected with the water pipe by means of the hand actuation of a control device forming a piston. Vhen the reservoir is filled up to a certain point with the water which has entered it after compressing the air, it'f is connected with the flush pipe through the pressure in the air reservoir which brings thek piston back into its rest position, where it sets the opening of the flush pipe free and closes the feed aperture.

In the known flush devices oit this type the movement of the piston into the position Where the reservoir is allowed to `be fed with water, is produced generally by the action of the hand onla rod secured to the piston. This control arrangement requires thatv a comparatively great resistance should be overcome so that in some cases, weak persons or children experience some difficulty in making the apparatus Work. On the other hand, as soon as the pressure in the air reser-` voir has reached the `value necessary for the flush tobe produced,` the flush passes throughV the closet with such a rush that there is a somewhat great water Vhammer etl'ect pro duced inthe feed pipe. `According to'my invention, these draw backs are completely' removed by providing for the movement. of the piston by lmeans of a screw having a great pitch,the said pitch being such that by rotating the screwby a fraction of a` revolution only the piston is brought into its feed position, the movement of the piston being however .much easier than when the piston rod has to be'pulled. On the other hand thescrew provided with a great pitch which `when the piston has been moved, must bev brought back through the pressure of the water produces a certain braking action and thereby prevents too speedy a tlush. Besides, this new arrange ment also allows the lush to be produced by a' mere action of the hand before the pressure in the air reservoir has reachedthe valuenormally `required for passing from the feed to the flush position, whereby the vflush can be produced with a lesser amount of fluid than in the normal case.

A 'form of execution otmy invention is shown by way of example on appended drawings Whereoix y Fig. l shows the air reservoir seen from behind with its flush device.

Fig. 2 is a vertical section at an enlarged scale, through the middle axis oi the flush device seen in its rest position.

Fig. 3 is a similar section with the flush device in its feed position.

Fig. 4 is a cross section along the 'line' IV-IV of Fig. 2. Y

yThe air reservoir l is V-shaped and is connectedat its lowest point which is in its mid-v dle with the flush pipe through the blow off connection. y

The flush valve passes through the whole of the air reservoir above which a Vcontrol crank 13 is secured to the valve rod projecting above the reservoir. `The connection placed behind the reservoirv for receiving the water feed pipe is shown at t. Inside the air reservoir is the casing 5 of the valve. About the middle of its height, this casing is connected with the water feed pipe through the said connection t passing into the rear of the reservoir. At its lowerl part inside the air reservoir, the casing shows a crown of apertures 26 wherethrough it is in connec tion with the inside of the air reservoir. The casing 5 comprises in the first place three parts 5, 5", 5, having diderent diameters; the part 5a is separated from the part 5b by a watertight sleeve 6: the part 5b is separated from the part 5c byv a watertight sleeve 7. In a. similar manner a watertight sleeve 8 `is disposed at the lower end of the part 5c of the casing between the casing and the blow-oil'4 2. Between vthe sleeves 6 and 7 is disposed in the casing a cylindrical` grid 9 which is to break the water jet passing into the casing through the connection t so as to prevent the pressure of this jet from acting only on one side of the piston disposed in the casing.` At the same timethe grid muiiles the noise of the water entering the casing.

The controlling vpiston which is hollow throughout its height shows steps along its length. Its top part l()a has a diameter Isomewhat greater than its lower part 10b. Between these two parts is a narrowpart 10c and the part 10b ends at its lower part withv a still narrower part 1091. The s part l0a moves always in front of the sleeve 6 whereas the part 10b is made watertight by the sleeve 7 when the-piston is raised (Fig. 2)V and bythe sleeve 8 when itis lowered (Fig. 3). V

The casing `oi vthe control valve is closed b y a threaded plug projecting outside the air reservoir. `This plug shows a holealong its axisl and acts as a bearing for the hollow Inside this hollow hub oit the crank, the hollow rod also shows a crown of holes 15, The air can thus pas's'into the hollow stein and as latter isvopen at its lower end, passes into the hollow pistoni() which is open throughoutits lengthwhereby the water is completely emptied.

The rod 12 shows at its lower part 12BL which is separated from the-top part passing through the bearing-plug 11 by ythe flange l16 a` long-pitched thread. A corresponding nut is provided by a thread borne by the top of the higher part e`oiY the piston. It is of advantage yto choose the thread so as to allow a Ahalf revolution of the crank .13 to be sutficientyto bringvthe piston from its higher position shown on Fi 2 to its lower position shown on Fig. 3.

f course, to allow the piston 1() to move along its axis when the threaded rod 4is made to rotate, itjmustbe securedgin a manner which prevents it from rotating. In View of this, a flange 17 isplaced atthe top vof thepiston. It shows two notches 18 placed yat thetwo opposite ends oit'ja diameter and these notches engage longitudinal -projections '20 secured inside the casing. The projections Q0 are integral with they sleeve 19 which through the pressure of the threaded plug 11, serves to. keep the sleeve 6 1n place andlthereby the grid 9 and the sleeve 7. In

the case where thesleeve 6 is not absolutely watertight and in `view of preventing the flush of water from passing above this sleeve and entering inside the casing above the said sleeve, the part 10?l shows inside the part containing the threaded nut and which is reinforced internally a crown.r of longitudinal channels 21 through which the iiush of water when `it reaches the topend of the piston can flow inside thel piston and from there into the flush pipe.` Y

. The working ot the apparatus is as follows:

In Fig. V2 it supposed that after the flush device has been actuated, the piston 10 is still in its higher positiony where the air reservoir is connected with the flush pipe through the holes 26 and the sleeve 8 which in this position is not in contact with thepart 10b. The piston is kept in this position by the pressure of the water which exists lin the chamber comprised between the sleeves 6 and 7, thsjchamber being connected constantly through the connection 4 with the'feed pipe. Under'l these conditions, the actuatingforce .l isthe excess pressure exerted on thelarger top part 10a. If a liush is :desired the `crank 13 is 4Vro- The hub oit the crank is hollowA tated by 180o and is moved towards the front ofthe figure. The position shown in Fig. 3 is thus obtained. The piston is brought then to itsA lower position as shown on Fig. 3 under tlieaction of the thread 12a. The sleeve 7 is brought in lront oi the narrow part 10c and the sleeve 8 is in watertight contact with the part 10h` so that the water is allowed to pass into the air reservoir through the chamber disposed between the sleeves 6 and 7, the narrow part 10` and the holes 26. The crank 18 can. then be brought backinto its original position (Fig. 2) aiter passing in front .of the plane of the figure, when water .has been allowed to enter the reservoir during the desired time.V The piston 10Vis then raised to its position in Fig. 2 under the action ofthe thread 1251. As the sleeve 7 bears .in a watertight manner against the part 10, the water cannot continue entering the air reservoir and the provision of water already-contained in the reservoir can flow linto the iiush pipe through the holes 26 and the sleeve 28 which no longer provides tor watertightness. It it is desired to obtain ior the flush Athe normal quantity of water', there is nothing more to do once the piston is brought into the position shown on Fig. 8. The reason is that when a given water pressure isObtained in the reservoir this water pressure makes the piston 10 rise because of the shape of this piston divided in parts of unequaldiameter, so that the passage from feed to flush position is automatic. During' this automatic raising of the piston, the rod 12 withits crank 13 is brought through the action of the thread l2 into the position shown on Fig. 2 so that after the air reservoir is emptied, all the parts of the apparatus are ready to provide for a new flush. Ot' course the threaded rod which is to fbe rotated affords-a certain resistance to the rising of the controlling piston whereby asudden stopping inthe entrance otv the water ini the piston casing and consequently the production 'of water hammer effects is prevented. v l

If requested,l the threaded rod' could be mounted looseon the piston s0 as to prevent its sliding along the direction of the axis and the closing plug could be provided with. the nut thread. The device intended for preventing the `piston 'from rotating could then be dispensed with. The form oi execution described is however preferable.`

That I claim is: A vdevicerfor vcontrolling the flush in flush vdevices for water closets com arising an air reservoir adapted to communicate withlthe Hush-pipe, u casingv in said reservoir, a vertical ditferential piston the largest part of which is uppermost adapted to move freely in the .casing and to close the communica tion of the air chamber on one hand with the casing and on the other with the flush pipe lll) `when it is respectively in its higher and lower position, a Water supply pipe opening in the easing in front of the piston, threads provided on the piston, a threaded spindle cooperating with the said threads and adapted to rotate Without moving` longitudinally, a crank controlling said piston, and means hand.

ROBERT STIOKDORlIla In Witness whereof I have hereunto set my 

